



<!DOCTYPE html>
<html>
<head lang="en">
  <meta charset="UTF-8">
  <title></title>
  <style>
    * {
      margin: 0;
      padding: 0;
    }
    
    ul {
      list-style: none;
    }
    
    .box {
      width: 600px;
      margin: 100px auto;
      border: 1px solid #000;
      padding: 20px;
    }
    
    textarea {
      width: 450px;
      height: 160px;
      outline: none;
      resize: none;
    }
    
    ul {
      width: 450px;
      padding-left: 80px;
    }
    
    ul li {
      line-height: 25px;
      border-bottom: 1px dashed #cccccc;
    }
    
    input {
      float: right;
    }
  
  
  </style>
</head>
<body>
<div class="box" id="weibo">
  <span>微博发布</span>
  <textarea name="" id="txt" cols="30" rows="10"></textarea>
  <button id="btn">发布</button>
  <ul id="ul">
  
  </ul>
</div>

<script src="jquery-1.12.4.js"></script>
<script>
  $(function () {
      $("#btn").click(function () {
          $("<li></li>").text($("#txt").val()).prependTo($("#ul"))
          $("#txt").val("")
      })

  })
</script>
</body>
</html>
